Mechanical properties and electromagnetic shielding performance of single-source-precursor synthesized dense monolithic SiC/HfCxN1-x/C ceramic nanocomposites
发布时间：2021-09-03
点击次数：
影响因子：7.39
DOI码：10.1039/C9TC02369K
发表刊物：Journal of Materials Chemistry C
摘要：For the first time, single-source-precursor synthesized dense monolithic SiC/HfCxN1−x/C ceramic nanocomposites with outstanding electromagnetic (EM) shielding performance at temperatures up to 600 °C are reported. The total shielding effectiveness (SET) of the SiC/HfCxN1−x/C monolith is >40 dB at 600 °C, which is superior than most of the reported EM shielding materials under the same conditions. Compared with a Hf-free SiC/C monolith, the SiC/HfCxN1−x/C monolith possesses superior EM shielding performance due to the presence of a highly conductive HfCxN1−x phase. Moreover, the HfCxN1−x-particles are covered by a carbon layer forming core–shell nanoparticles connected with graphite-like carbon ribbons, which result in electrically conductive networks within the semiconducting β-SiC matrix. In addition, the hardness, Young's modulus and flexural strength of the dense SiC/HfCxN1−x/C monolith are measured to be 29 ± 4 GPa, 381 ± 29 GPa and 320 ± 25 MPa, respectively. The outstanding EM shielding performance combined with excellent mechanical properties of the dense monolithic SiC/HfCxN1−x/C nanocomposites provides a novel strategy to fabricate EM shielding materials for applications in harsh environments and/or under high mechanical load.
合写作者：Xingmin Liu, Bruns Sebastian, Xiaowei Yin, Mirva Eriksson, Zhijian James Shen, Ralf Riedel
第一作者：Qingbo Wen
论文类型：期刊论文
通讯作者：Zhaoju Yu
文献类型：J
卷号：7
期号：34
页面范围：10683-10693
是否译文：否
发表时间：2019-08-14
收录刊物：SCI
发布期刊链接：https://pubs.rsc.org/en/content/articlelanding/2019/tc/c9tc02369k